QCM200 Quartz Crystal Microbalances0 pages

Quartz Crystal Microbalance
QCM200 — 5 MHz quartz crystal microbalance
Quartz Crystal Microbalance
· Measures frequency and resistance
· Analog output for potentiostats
· Reads highly loaded crystals
(up to 5 kΩ)
· Transformer-isolated crystal
· Simple shunt-capacitance cancellation
· External 10 MHz input
· Windows/Mac software
The QCM200 Quartz Crystal Microbalance measures mass
and viscosity in processes occurring at or near surfaces, or
within thin films. This system include a controller, crystal
oscillator electronics, crystal holder, three quartz crystals, and
Windows/Mac software.
The instrument read the resonant frequency and resistance
of a 5 MHz, AT-cut quartz crystal. The resonant frequency
changes as a linear function of the mass of material deposited
on the crystal surface. The resistance at resonance changes
with the viscosity / elasticity of the material (film or liquid) in
contact with the crystal surface.
As a gravimetric instrument, the QCM200 can measure
mass ranging from micrograms to fractions of a nanogram.
Detection limits correspond to submonolayers of atoms.
Observations of conformational changes, such as phase
transitions, swelling, and cross-linking, can easily be made.
Specifically designed to handle heavy loads (up to 5 kΩ),
the instrument will maintain oscillation in aqueous solutions
containing over 88 % glycerol (w/w %). It is ideal for studies
involving lossy films and highly viscous liquids.
QCM200
· QCM200 ... $2795 (U.S. list)
The QCM200 is a stand-alone instrument with a built-in
frequency counter and resistance meter. Series resonance
frequency and resistance are measured and displayed, and
there is an analog output proportional to frequency which can
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www.thinkSRS.com